First: use notepad++ or don't complain that you can't read this. https://notepad-plus-plus.org/download/v7.5.6.html 

Second: at the end of Versionmanifest.csv in your data folder add the following in a new line before the final comma:
Gear_Masc,UpgradeDef,data/mod/upgrades/Gear_Masc.json,15,2018-02-27T00:45:28.9665248Z,2018-04-05T01:11:45.2745976Z,,,False,0,False

Third: place Gear_Masc.json in data/mod/upgrades  if the directory doesn't exist create it

Fourth:
Pick a shop like shopdef_Componants.json  and insert this after  "Inventory" : [ so that it looks like this:

   "Inventory" : [
		{
         "ID" : "Gear_Masc",
         "Type" : "HeatSink",
         "DiscountModifier" : 1.0,
         "Count" : 0
		},
		{
         "ID" : "Gear_JumpJet_Generic_Standard",
         "Type" : "JumpJet",
         "DiscountModifier" : 1.0,
         "Count" : 0
        },
		
Fifth: This is just a hacked together mod until I can make one more in line with the actuall BT rules but if you use any of this gimmie credit.